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Stress-driven grain re-orientation and merging behaviour found in oxidation of zirconium alloy using in-situ method and MD simulation

机译:原位法和MD模拟发现锆合金氧化过程中应力驱动的晶粒重新取向和融合行为

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摘要

It has been believed that ZrO2 columnar grains, which contribute to the reduction of oxygen diffusion in the oxide layer, are the result of growth of small grains, and the subsequent oxidation mechanism of zirconium alloy is also formed and developed on this basis. Here we report an in situ oxidation experiment carried out at 500 degrees C air condition demonstrating that large size ZrO2 grains was results of the merging of small size grains rather than growth of small grains. We further show that original orientation and dislocation motion play crucial roles in the merging process of small size grains.
机译:据信,ZrO 2柱状晶粒是小晶粒生长的结果,其有助于减少氧化物层中的氧扩散,并且在此基础上还形成并发展了锆合金的后续氧化机理。在这里,我们报告了在500摄氏度的空调条件下进行的原位氧化实验,表明大尺寸ZrO2晶粒是小尺寸晶粒合并而不是小晶粒生长的结果。我们进一步表明,原始取向和位错运动在小晶粒的合并过程中起着至关重要的作用。

著录项

  • 来源
    《Corrosion science》 |2019年第2期|350-356|共7页
  • 作者单位

    Nucl Power Inst China, Reactor Operat & Applicat Res Subinst, Chengdu 610213, Sichuan, Peoples R China;

    Shanghai Univ, Inst Mat, Shanghai 200072, Peoples R China;

    Nucl Power Inst China, Reactor Operat & Applicat Res Subinst, Chengdu 610213, Sichuan, Peoples R China;

    Gatan Inc, Shanghai 200333, Peoples R China;

    Nucl Power Inst China, Reactor Operat & Applicat Res Subinst, Chengdu 610213, Sichuan, Peoples R China;

    Nucl Power Inst China, Reactor Operat & Applicat Res Subinst, Chengdu 610213, Sichuan, Peoples R China;

    Nucl Power Inst China, Reactor Operat & Applicat Res Subinst, Chengdu 610213, Sichuan, Peoples R China;

    Nucl Power Inst China, Reactor Operat & Applicat Res Subinst, Chengdu 610213, Sichuan, Peoples R China;

    Natl Acad Sci Ukraine, Inst Appl Phys, UA-40000 Sumy, Ukraine;

    Nucl Power Inst China, Reactor Operat & Applicat Res Subinst, Chengdu 610213, Sichuan, Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Zirconium alloy; In-situ TEM; MD simulation; Oxidation mechanism; Re-orientation; Stress;

    机译:锆合金;原位TEM;MD模拟;氧化机理;重取向;应力;
  • 入库时间 2022-08-18 04:13:38

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